| 1 | pPeOp inhibits HGC-27 cell proliferation,migration and invasion by upregulating miR-30b-5p and down-regulating the Rac1/Cdc42 pathway显示文摘Gastric cancer is the fifth most frequently occurring and the fourth most lethal malignant cancer worldwide.A bioactive protein(pPeOp)from Omphalia lapidescens exhibits significant inhibitory effects on gastric cancer cells.miRNA deep sequencing analysis shows that miR-30b-5p is significantly upregulated in HGC-27 cells treated with pPeOp.Verification results show that the expression level of miR-30b-5p is significantly increased in HGC-27 cells after pPeOp treatment.Additionally,miR-30b-5p is significantly downregulated in clinical gastric cancer tissues compared to that in adjacent normal tissues.Following pPeOp treatment and/or transfection with miR-30b-5p mimic,the proliferation,migration,and invasion of HGC-27 cells are significantly impaired.Immunofluorescence microscopy shows that pPeOp and/or miR-30b-5p destroy(s)microfilaments and microstructures and inhibit(s)the formation of pseudopodia.Bioinformatics analysis,dual-luciferase reporter assay,and western blot analysis confirm that miR-30b-5p downregulates Rac1/Cdc42 expression and activation by targeting RAB22A.Available data indicate that miR-30b-5p plays an anti-gastric cancer role in mediating pPeOp.pPeOp upregulates miR-30b-5p expression,which in turn inhibits RAB22A expression,resulting in a reduction in the expression and activation of Rac1 and Cdc42 and their downstream targets,thus destroying the cytoskeletal structure and inhibiting the proliferation,migration,and invasion of cancer cells. | Wenjun Xu Zhenjie Fu Yuqin Xu Man Hei Cheung Yan Chen Meiai Lin Hang Wen Hang Lv Chun Liang Jianshu Lou Yitao Chen | 2022 | Acta Biochimica et Biophysica Sinica2022，54，12： | 0 |
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